Mouth Taping: What Taping Your Mouth Shut During Sleep Can Do and Where the Risks Lie
A strip of tape across your lips is supposed to transform the night. There are good physiological reasons in favour of nasal breathing. The tape itself has barely been studied and can become a risk with a blocked nose or sleep apnoea.
The circle of light breathes at a pace of six breaths per minute. Feel free to breathe along with it for a while.
I take this trend seriously. Behind every strip of tape there is a real longing: to finally wake up rested. But an open mouth at night is often an answer from your body. Before you seal it shut, it is worth asking what it is answering.
Maybe you have seen this video too. A bathroom in the evening, warm light, the phone propped against the mirror. Someone tears off a strip of tape and sticks it across their lips. Then a cut.
The next morning, the same face, this time beaming. The best night in years, they say. No snoring, no dry mouth, finally awake.
I understand well why videos like this get shared so often. If you have been waking up shattered for months, you do not want a lecture. You want something that starts tonight. And a piece of tape costs a few cents.
In this article we take a closer look together. At what your nose does at night. At what studies on mouth taping show. And at the moments when an open mouth is not a mistake but an emergency exit.
What this article covers
- Why a single video reveals little about your night
- What your nose does with the air before it reaches your lungs
- Nitric oxide: a messenger from your sinuses
- How breathing rhythm, the vagus nerve and the brain are connected
- What ten studies on mouth taping show, and what they do not
- Who taping your mouth shut can be dangerous for
- Why snoring deserves a proper assessment
- Three ways to more nasal breathing, without any tape
Does mouth taping during sleep do anything?
Nasal breathing during sleep has well-founded advantages. The nose warms, humidifies and filters the air, and during sleep airway resistance is lower than with mouth breathing. On taping the mouth shut, by contrast, there are only a few small studies. A 2025 systematic review found ten studies with 213 participants in total, and only two of them showed measurable improvements in sleep apnoea values. With a blocked nose, heavy mouth breathing or untreated sleep apnoea, tape can be risky. And it is no substitute for having snoring assessed.
One video, one night and a big promise
The best night in years
I have seen this video in many versions. Sometimes it comes from a fitness channel, sometimes from a morning routine, sometimes from a post about biohacking. The storyline is almost always the same, and the sentence at the end sounds much the same every time:
What the video does not show: how this person's nose is built. Whether they snore. Whether someone next to them has noticed pauses in their breathing. Whether, in the same week, they went to bed earlier, drank less alcohol or simply expected to sleep better.
At best, a single video shows a link in time, not causation. That does not make the experience wrong. It just does not automatically make it yours.
The enthusiasm is understandable, and it does not come out of nowhere. Nasal breathing during sleep is a good thing, and there are solid physiological reasons for that. It just does not follow that tape is the best way to get there.
A team in Washington has counted just how wide the gap between video and research is.
A team at George Washington University searched the medical literature on nocturnal mouth taping and also analysed 50 TikTok videos.
Of 177 studies found, only nine fitted the question, and the most common promises in the videos were better sleep and oral health.
For you that means: hardly any claim from the videos has been specifically studied, and there is little agreement about the benefit.
Fangmeyer SK, Badger CD, Thakkar PG. Am J Otolaryngol 2025. DOI: 10.1016/j.amjoto.2024.104545A personal account is a good starting point for a question. It is not the end of it.
The question is not: does tape work? The question is: why is my mouth open at night, and what does my body need for it to close by itself?
And now you know why a convincing video is not yet an answer for your night.
Why is nasal breathing so important during sleep?
Do you remember your last cold? Your nose was blocked, your mouth hung open. In the morning your throat felt like sandpaper.
That one night says a lot about your nose. It is not just an opening in your face. It is an air conditioner, a humidifier and a bouncer all in one.
When air flows through the nose, it passes the nasal turbinates. These are ridges with a rich blood supply that work much like the fins of a radiator. The moist mucous membrane releases water into the air. Tiny hairs called cilia push dust and germs towards the throat as if on a conveyor belt.
In 2011 the ear, nose and throat (ENT) specialists Sahin-Yilmaz and Naclerio summarised what the nose does for breathing.
It warms the inhaled air towards 37 degrees Celsius, humidifies it towards 100 percent relative humidity and filters particles and gases.
For you that means: a breath through the nose arrives in the lungs prepared, a breath through the mouth arrives rather raw.
Sahin-Yilmaz A, Naclerio RM. Proc Am Thorac Soc 2011. DOI: 10.1513/pats.201007-050RNYour body seems to know this. A team in Canada measured how healthy people actually breathe at night.
A team at Queen's University in Canada measured airflow through the nose and the mouth separately in ten healthy people during sleep.
Only 4.3 percent of the inhaled air took the route through the mouth during sleep, and the sleep stage made hardly any difference to that.
For you that means: at night a healthy body chooses the nose almost exclusively, as long as it is clear.
Fitzpatrick MF, Driver HS, Chatha N, Voduc N, Girard AM. J Appl Physiol 2003. DOI: 10.1152/japplphysiol.00658.2002Why is that? When the mouth opens, the lower jaw can sink backwards and take the tongue with it. The throat can narrow. Imagine a soft garden hose: the narrower it is at one point, the more easily it collapses when air is sucked through it.
In a randomised crossover study by the same research group, twelve healthy people breathed during sleep sometimes through the nose and sometimes through the mouth.
While awake, airway resistance was the same on both routes. During sleep it was 12.4 instead of 5.2 units with mouth breathing, and breathing interruptions rose from 1.5 to 43 per hour.
For you that means: even healthy airways become less stable at night when the air has to take the route through the mouth.
Fitzpatrick MF, McLean H, Urton AM, Tan A, O'Donnell D, Driver HS. Eur Respir J 2003. DOI: 10.1183/09031936.03.00047903Randomised crossover study with 12 healthy adults in the sleep laboratory. Breathing interruptions here means apnoeas and hypopnoeas combined.
- Warms the air towards 37 degrees Celsius
- Humidifies it towards 100 percent relative humidity
- Filters particles and gases
- Carries nitric oxide from the sinuses along with it
- Low airway resistance during sleep
- A short route with little conditioning of the air
- Mouth and throat can dry out
- The pH in the mouth drops further at night
- The throat can narrow
- Markedly higher airway resistance during sleep
The mouth is built for eating, talking and kissing. The nose is built for breathing. At night this difference shows particularly clearly.
An open mouth during sleep is therefore a clue worth following up. Quite often, the route through the nose is then simply not clear enough.
And now you know why the route your breath takes counts for even more at night than during the day.
Nitric oxide: a messenger from your sinuses
Have you ever wondered why you have sinuses? Most people only notice them when they press and ache during a cold.
For a long time there were mainly guesses about their purpose, for example that they make the skull lighter. Since the mid-1990s researchers have known more: a gas with astonishing tasks is produced in them.
In 2008 the physiologist Jon Lundberg of the Karolinska Institute in Stockholm summarised what was known about nitric oxide from the sinuses.
The healthy mucous membrane constantly produces large amounts of it, more than is needed to inhibit bacteria in laboratory experiments. With every breath through the nose, some of it reaches the lungs, where it can support oxygen uptake.
For you that means: your nose sends a messenger along with every breath, and air taking the route through the mouth largely flows past it.
Lundberg JO. Anat Rec (Hoboken) 2008. DOI: 10.1002/ar.20782Imagine nitric oxide as a message in a bottle. It is written in the sinuses and drifts into the lungs with every breath through the nose. There it can widen small blood vessels and so make it easier to take up oxygen. This is why Lundberg describes the gas as an “aerocrine” hormone: produced in one place, active in another.
In 1996 Lundberg and colleagues compared oxygen levels in the skin of eight healthy people during nasal and mouth breathing.
In six of the eight, transcutaneous oxygen partial pressure was 10 percent higher with nasal breathing. In people on mechanical ventilation, blood oxygen rose by 18 percent when they were given air from their own nose.
For you that means: the route your breath takes might help determine how much oxygen arrives. The study was, however, very small.
Lundberg JO, Settergren G, Gelinder S, Lundberg JM, Alving K, Weitzberg E. Acta Physiol Scand 1996. DOI: 10.1046/j.1365-201X.1996.557321000.xAnd then there is a finding that sounds almost playful.
In 2002 Eddie Weitzberg and Jon Lundberg had ten healthy people hum and measured the nitric oxide in the air they breathed out through the nose.
While humming, the level rose to 15 times that of quiet exhalation. A model showed that the vibrating air greatly speeds up the exchange with the sinuses.
For you that means: humming is a simple way to air out your sinuses. Whether this has any health consequences is still open.
Weitzberg E, Lundberg JO. Am J Respir Crit Care Med 2002. DOI: 10.1164/rccm.200202-138BCNasal breathing is more than an airway. It is a quiet chemical conversation between nose and lungs.
When you breathe through your mouth, the air takes a shortcut past this conversation. A clear nose invites you to pick it up again.
And now you know why researchers talk about a hormone that travels with the air when you breathe through your nose.
Breathing rhythm, the vagus nerve and your brain
Pay attention to your nose for three breaths. Can you feel the air flowing in cool and leaving a little warmer? Many people become a little calmer just by doing this.
That is no coincidence. Breathing is one of the few bodily functions that run by themselves and that you can still steer consciously. Through it you can influence the vagus nerve.
The vagus nerve is something like the brake pedal of your heart. How flexibly this pedal works is shown by heart rate variability, HRV for short. A higher HRV at rest is regarded as a sign of an adaptable nervous system.
In 2023 researchers at Florida State University had twenty young adults breathe only through the nose or only through the mouth for five minutes each, in random order.
With nasal breathing, diastolic blood pressure was 68 instead of 72 mmHg. The parasympathetic share of heart rate variability rose from 52 to 59 percent.
For you that means: the route your breath takes might on its own put a little more emphasis on the brake pedal of your nervous system, although the measurements were taken while awake.
Watso JC, Cuba JN, Boutwell SL, et al. Am J Physiol Regul Integr Comp Physiol 2023. DOI: 10.1152/ajpregu.00148.2023In 2022 Laborde and colleagues from the German Sport University Cologne analysed a total of 223 studies on deliberately slow breathing.
During the exercise, immediately afterwards and after programmes lasting several weeks, vagally mediated heart rate variability increased.
For you that means: slow breathing is one of the best studied ways to stimulate vagal activity, and the authors expect hardly any side effects.
Laborde S, Allen MS, Borges U, et al. Neurosci Biobehav Rev 2022. DOI: 10.1016/j.neubiorev.2022.104711You can find out how to practise slow breathing in everyday life in the article on breathing techniques for the nervous system and the vagus nerve and in the post on 4-7-8 breathing for falling asleep.
Your breath even reaches into your brain. It sets the rhythm for areas that have to do with emotions and memories.
Christina Zelano of Northwestern University in Chicago and her team measured brain activity directly inside the brains of people with epilepsy that is difficult to treat.
Breathing through the nose set the pace of rhythms in the olfactory cortex, the amygdala and the hippocampus, most strongly during inhalation. When the air flowed through the mouth, this rhythm faded.
For you that means: nasal breathing is also a pacemaker for brain regions that process emotions and memory.
Zelano C, Jiang H, Zhou G, et al. J Neurosci 2016. DOI: 10.1523/JNEUROSCI.2586-16.2016In accompanying behavioural tests, the phase of breathing was linked to how well healthy people recognised fear and retrieved memories. That is a fascinating finding. It has not yet been translated to sleep.
In the anthroposophic understanding of the human being, which also shapes my perspective, breathing and heartbeat form the rhythmic system. There it is regarded as the centre between the nerve-sense system and metabolism, connected with feeling.
From this point of view, calm nasal breathing is more than a technique. It is the care of a rhythm. A study from Italy gives this old idea a measurable side.
In 2001 Bernardi and colleagues from Pavia and Florence had 23 healthy people recite the Ave Maria in Latin or a yoga mantra.
Both formulas led to about six breaths per minute and, in synchrony, strengthened the rhythms of the heart and circulation. Baroreflex sensitivity rose from 9.5 to 11.5 ms/mmHg.
For you that means: old rituals may have intuitively found a breathing rhythm that physiology can measure today.
Bernardi L, Sleight P, Bandinelli G, et al. BMJ 2001. DOI: 10.1136/bmj.323.7327.1446Your breath is not background noise. It is a pacemaker that you can help shape at any time.
A strip of tape at night only changes the route the air takes. The rhythm is something you learn during the day.
And now you know why your nose might have more to do with your inner calm than it seems at first glance.
The four KPNI lenses on a night with an open mouth
Imagine a perfectly ordinary night in which your mouth stays open. From the outside, almost nothing happens. Inside, four systems are working at the same time, and they talk to each other.
In clinical psychoneuroimmunology we look closely at exactly this interplay. Nervous system, immune system, metabolism and hormones are not separate departments. They are a network.
Nervous system
With mouth breathing, airway resistance rises during sleep and breathing interruptions become more frequent. Each interruption can briefly wake the brain and push the sympathetic nervous system, in other words the accelerator. While awake, by contrast, nasal breathing went along with a higher parasympathetic share of HRV.
Immune system
The nose filters particles, and its cilia clear away germs. Nitric oxide from the sinuses can inhibit the growth of pathogens and stimulate the cilia. With mouth breathing, the air flows past this first line of defence.
Metabolism
In the lungs, nitric oxide can support oxygen uptake. In a small study, oxygen partial pressure in the skin was 10 percent higher with nasal breathing. At the same time, the mouth becomes more acidic with mouth breathing at night, which could put strain on the tooth surface.
Hormonal system
Lundberg describes nitric oxide as an aerocrine hormone that travels with the air you breathe. In sleep apnoea, breathing against the closed throat creates negative pressure in the chest. The heart is stretched and releases ANP, a hormone that makes the body excrete salt and water. Needing to urinate at night can therefore be a sign of disturbed breathing.
A team at the University of Otago in New Zealand measured the pH in the mouth of ten healthy people overnight, sometimes with and sometimes without a nose clip.
During the day the pH averaged 7.3, during normal sleep 7.0 and during forced mouth breathing 6.6. With the nose clip it dropped further and for longer.
For you that means: mouth breathing makes the mouth more acidic at night, which is discussed as a possible factor in dental erosion and tooth decay.
Choi JE, Waddell JN, Lyons KM, Kieser JA. J Oral Rehabil 2016. DOI: 10.1111/joor.12372An open mouth is not a cosmetic flaw of the night. It can be a junction where nerves, defences, metabolism and hormones meet.
That is exactly why it is not enough to simply close the mouth. It is worth understanding why it opens.
And now you know why a seemingly small habit during sleep can touch so many levels.
What do studies on mouth taping show?
Perhaps you are thinking now: then tape is exactly right. It forces the body to use the nose. This logic sounds compellingly simple.
So let us see whether it holds up in studies. The honest answer up front: there is surprisingly little research, and what exists is small.
In 2025 Jess Rhee and colleagues from London, Canada, systematically gathered all studies on mouth taping in mouth breathing, snoring and sleep apnoea.
Only ten studies with 213 participants met the criteria, and only two of them showed measurable improvements in sleep apnoea values.
For you that means: the authors see a potentially serious risk for anyone who adopts the trend without a medical assessment, and they call for better studies.
Rhee J, Iansavitchene A, Mannala S, Graham ME, Rotenberg B. PLoS One 2025. DOI: 10.1371/journal.pone.0323643Systematic review by Rhee and colleagues, PLOS ONE 2025. Many of the studies excluded people with a blocked nose from the outset.
The best known positive findings come from two small studies from Taiwan. Both examined people with mild sleep apnoea who breathed through their mouths at night.
Yi-Chieh Lee and colleagues at Chang Gung Memorial Hospital compared one measurement night without tape in 20 mouth breathers with a second night, one week later, with tape.
The median apnoea-hypopnoea index fell from 8.3 to 4.7 per hour, the snoring index by 47 percent, and 13 of the 20 responded well.
For you that means: in mild sleep apnoea with mouth breathing, tape can make some difference, but without a control group it remains open how much of that was expectation.
Lee YC, Lu CT, Cheng WN, Li HY. Healthcare (Basel) 2022. DOI: 10.3390/healthcare10091755An older pilot study from Taipei with 30 people with mild sleep apnoea used a porous oral patch. There, the apnoea-hypopnoea index fell from 12.0 to 7.8 per hour, and snoring became quieter. Here too, there was no control group.
As soon as researchers build in a real comparison group, the picture becomes more sober.
In 2009 Sue Cooper and colleagues at the University of Nottingham tested mouth tape at night in 51 people with asthma, in a randomised and single-blind design.
Four weeks of tape changed neither morning peak flow nor symptoms, even though most participants taped almost every night.
For you that means: an attractive theory about nasal breathing did not lead to a measurable benefit here.
Cooper S, Oborne J, Harrison T, Tattersfield A. Respir Med 2009. DOI: 10.1016/j.rmed.2009.02.003A randomised comparison from St. Louis in people who snore but do not have sleep apnoea shows a similar pattern. A package of an external nasal strip, a nasal rinse with an anti-inflammatory agent, mouth tape and side sleeping was rated as clearly better by 58 percent of bed partners. With a mandibular advancement splint, the figure was 91 percent.
And then there is a finding that puts tape in a different light. Not as a shortcut, but as an addition under medical supervision.
In 2025 a team at Chulalongkorn University in Bangkok tested mouth tape in 62 people who wore a CPAP mask for sleep apnoea and breathed through their mouths.
With tape, they used the mask on average 51.8 minutes longer per day. Daytime sleepiness, snoring and dry mouth improved, but side effects were reported as well.
For you that means: under medical supervision, tape can complement a treatment. As a substitute for a proper assessment, it is not suitable.
Meksukree A, Pitipanyakul S, Laohavinij W, et al. J Clin Sleep Med 2025. DOI: 10.5664/jcsm.11870| Study | Who and how | Finding |
|---|---|---|
| Huang 2015, Taipei | 30 adults with mild sleep apnoea, porous oral patch, no control group | Effect AHI from 12.0 to 7.8 per hour, quieter snoring |
| Lee 2022, Taiwan | 20 mouth breathers with mild sleep apnoea, measurement night with tape, no control group | Effect AHI from 8.3 to 4.7 per hour, snoring index 47 percent lower |
| Jau 2023, Taipei | 71 people, one night each without and with tape | Mixed No better desaturation in about half, frequent mouth puffing |
| Yang 2024 | 54 people with sleep apnoea, mouth closure during sleep endoscopy | Risk signal More airflow on average, less in heavy mouth breathers with a narrowing in the nasopharynx |
| Cooper 2009, Nottingham | 51 people with asthma, randomised, four weeks of tape | No effect No change in peak flow or symptoms |
| Ioerger 2024, St. Louis | 50 couples, snoring without sleep apnoea, randomised | Comparison Package with tape: 58 percent clearly better, mandibular advancement splint: 91 percent |
| Meksukree 2025, Bangkok | 62 people with sleep apnoea and CPAP, randomised crossover | Effect as an add-on 51.8 minutes more CPAP use per day, side effects reported |
Ten studies with 213 people. That is fewer than fit into a large lecture hall. For a ritual that so many people copy from social media, that is surprisingly little knowledge.
Little studied does not mean worthless. It means: open.
And where much is open, a simple rule applies. The higher your possible risk, the more important an assessment is before you experiment.
And now you know why the evidence on mouth taping is more of a question mark than an exclamation mark.
Who can mouth taping be dangerous for?
Imagine you are lying in bed with a blocked nose. Your mouth is the only route that is still open. And that is exactly the route you have just taped shut.
This scene sounds drastic. But it describes the risk that the 2025 systematic review explicitly points out: a risk of suffocation when the nose is obstructed.
But there are also quieter risks. They affect people for whom the open mouth has a job to do at night.
In 2024 Hyungchae Yang and colleagues examined what happens when the mouth is closed in 54 people with sleep apnoea under drug-induced sleep.
On average, airflow rose by 27.8 percentage points. In heavy mouth breathers with a narrowing in the nasopharynx, however, it fell.
For you that means: for some people the open mouth is a necessary detour that tape would block.
Yang H, Huyett P, Wang TY, et al. JAMA Otolaryngol Head Neck Surg 2024. DOI: 10.1001/jamaoto.2024.3319Researchers from Taiwan have given another phenomenon a name: mouth puffing. Under the tape the cheeks puff out, and air escapes between the lips, sometimes out to the side. It is as if the body were looking for an emergency exit.
In 2023 Je-Yang Jau and colleagues from Taipei measured one night without and one night with a taped mouth in 71 people.
In severe sleep apnoea, mouth puffing was particularly frequent, and in about half of the participants nocturnal oxygen desaturation did not improve with tape.
For you that means: where the throat is narrow, a closed mouth can shift the problem instead of making it smaller.
Jau JY, Kuo TBJ, Li LPH, et al. Nat Sci Sleep 2023. DOI: 10.2147/NSS.S384387In 2026 a team at King Saud University in Riyadh pooled studies in which the nose was obstructed experimentally or after surgery.
An obstructed nose went along with 13.78 additional breathing interruptions and 7.45 additional drops in oxygen per hour, in some cases even in people who had previously been healthy.
For you that means: a clear nose is one foundation of restful nights. A blocked nose is no moment for tape.
Alshehri NA, Alsaif NF, Abdulrazaq AN, Jabor RM, Al-Sayed AA. OTO Open 2026. DOI: 10.1002/oto2.70294The large Wisconsin Sleep Cohort also shows how closely a blocked nose and snoring are linked. Among 4,916 adults, people whose nose was almost always blocked had roughly three times the odds of snoring regularly. If the nose stayed blocked over five years, the odds were almost five times as high.
When I advise against taping your mouth
- Blocked nose: with a cold, hay fever, allergies, nasal polyps or a deviated septum.
- Snoring with pauses in breathing: as long as it has not been clarified whether sleep apnoea lies behind it.
- Known sleep apnoea: only in consultation with your care team, for example as an add-on to CPAP therapy.
- Alcohol, sedatives or sleeping pills: they can dampen protective reflexes during sleep. This combination has not been studied, and I consider it unnecessarily risky.
- Nausea, reflux or vomiting: this risk is also discussed in the 2025 review.
- Children: the studies mainly involve adults. Mouth breathing in children should be assessed by a paediatrician or an ENT specialist.
- Irritated skin or lips: side effects were reported in studies too.
What stands out: many studies on mouth taping excluded exactly these people from the outset. Their results therefore cannot be transferred to them.
Sometimes the open mouth is not a fault in the system. It can be the detour your body uses to get air.
Before you tape this detour shut, you should know where else the air is supposed to go.
And now you know why the same measure can be harmless for one person and risky for another.
Snoring is a signal, not a noise to tape over
Perhaps you do not even know that you snore. Many people find out through an irritated remark at the breakfast table. Or through an elbow in the middle of the night.
Snoring happens when soft tissue in the throat flutters in the airflow. That can be harmless. But it can also be the audible sign of a throat that repeatedly narrows or briefly collapses at night.
It is easy to underestimate how widespread obstructive sleep apnoea is. In 2019 a global estimate arrived at around 936 million adults aged 30 to 69 with at least a mild form. The analysis was funded by a device manufacturer. Data from Germany also show how common it is.
In the SHIP-Trend study, Ingo Fietze and colleagues from Charité Berlin examined 1,208 adults from Western Pomerania with overnight polysomnography.
Almost half, 46 percent to be precise, had at least mild obstructive sleep apnoea, and 21 percent had a moderate to severe form. Daytime sleepiness was not linked to the diagnosis.
For you that means: sleep apnoea is common and often silent. You can be affected without feeling tired during the day.
Fietze I, Laharnar N, Obst A, et al. J Sleep Res 2019. DOI: 10.1111/jsr.12770In 2006 Arie Oksenberg and colleagues from Israel surveyed people from a sleep laboratory and a comparison group from a general health examination.
Almost always waking up with a dry mouth was reported by 31.4 percent of people with sleep apnoea, 16.4 percent of people who only snored and 3.2 percent of the comparison group.
For you that means: a dry mouth in the morning can be a sign of sleep apnoea. Instead of taping it away, it is worth looking at what lies behind it.
Oksenberg A, Froom P, Melamed S. J Sleep Res 2006. DOI: 10.1111/j.1365-2869.2006.00527.xAnother silent sign is needing to urinate at night. As described in the KPNI section, the heart can release ANP during breathing interruptions and stimulate the kidneys to excrete more. If you have to go to the toilet several times a night, your breathing is probably the last thing you think of.
For me, this is where the strongest argument against tape as a shortcut lies. Tape can make snoring quieter: in the study by Lee and colleagues, the snoring index fell by 47 percent. But quieter sleep is not automatically healthier sleep. In the study by Jau and colleagues, oxygen desaturation did not improve with tape in about half of the participants.
Signals that deserve an assessment
- Loud, regular snoring that persists for weeks.
- Observed pauses in breathing or gasping for air at night.
- A dry mouth almost every morning or a rough throat.
- Frequently needing to urinate at night with no other explanation.
- High blood pressure, because in the German population study it occurred more often together with severe sleep apnoea.
- Daytime sleepiness or problems concentrating, although sleep apnoea can also be present without tiredness.
An assessment usually begins with a detailed conversation and a sleep study, either at home or in a sleep laboratory. Depending on the findings, ENT specialists look at the nose and throat. Dentists check whether a mandibular advancement splint is an option. You can read more about this in the article Recognising sleep apnoea: understanding symptoms, diagnostics and therapy.
There are established treatments for obstructive sleep apnoea, above all CPAP therapy and mandibular advancement splints. They are important and can bring relief to many people.
What I add is a look at the nose, breathing patterns, muscle tone and rhythm. Not as a replacement, but as an additional layer. The CPAP study from Bangkok in particular shows that the two can go together.
This is not just about a quiet night for the person next to you. It is about a body that can breathe freely at night, so that during the day you can be awake, clear and fully present.
Tape can muffle a noise. An assessment can find a cause.
One calms the night from the outside. The other gives you the chance to change it from within.
And now you know why snoring deserves a question before it gets a strip of tape.
How can you breathe more through your nose during the day?
Watch yourself today: at your desk, while scrolling, while cooking. Is your mouth closed? Many people catch themselves with it slightly open.
That is no reason to criticise yourself. It is a starting point. Because what you practise during the day, your body might take with it into the night. At least, that is what the studies on exercises for the tongue and throat suggest.
In 2024 Elias Saba and colleagues from Kaiser Permanente in Oakland analysed seven randomised studies with 310 people on myofunctional therapy.
In adults, the apnoea-hypopnoea index fell by an average of 10.2 events per hour compared with sham therapy or no therapy. Daytime sleepiness and sleep quality also improved.
For you that means: training the tongue and throat can stabilise the airways from within. In children, it often failed because they did not keep it up.
Saba ES, Kim H, Huynh P, Jiang N. Laryngoscope 2024. DOI: 10.1002/lary.30974An older meta-analysis from 2015 came to a similar result. There, the apnoea-hypopnoea index in adults roughly halved after myofunctional therapy. However, it mainly compared values before and after therapy.
In 2006 Milo Puhan and colleagues from Zurich had people with moderate sleep apnoea and snoring play the didgeridoo for four months.
Compared with the waiting list, daytime sleepiness and breathing interruptions decreased, and partners felt less disturbed at night.
For you that means: what challenges the throat muscles can change the night. Sometimes training even sounds like music.
Puhan MA, Suarez A, Lo Cascio C, Zahn A, Heitz M, Braendli O. BMJ 2006. DOI: 10.1136/bmj.38705.470590.55The principle behind both approaches is the same. The muscles that keep your throat open can apparently be trained. Tape works on the outside, at the lips. Training works on the inside, on the structures that have to carry the load at night.
Three levers for more nasal breathing, without any tape
Clear the route through your nose
If your nose is often blocked, this is where the work begins. Allergies, histamine intolerance, polyps, enlarged turbinates or a deviated septum can be investigated. A clear nose is the foundation on which everything else builds. You can find more on histamine and restless nights in the article on histamine and sleep problems.
Practise nasal breathing while you are awake
Lips loosely closed, the tongue resting broadly against the palate, the air flowing quietly and slowly through the nose. Turn this into small islands in your day, for example at traffic lights, in a queue or before you fall asleep. Gentle humming can also help air out your sinuses. If you want to train in a targeted way, speech and language therapists can guide you through myofunctional exercises for the tongue and throat.
Have your snoring assessed before you tape over it
If you snore regularly, someone has noticed pauses in your breathing or you almost always wake up with a dry mouth, a sleep study is the more sensible first step. It shows whether sleep apnoea lies behind the noise. Only then can you make a good decision about which kind of support suits you.
I do not recommend mouth taping as something to try on your own. If you still want to test it, talk to your doctor first, especially if you snore. The studies used silicone or porous patches that are gentle on the skin, and people with nasal problems were excluded from many of the studies.
Never with a blocked nose, never in children, never after alcohol or sleeping pills. And if you feel restless or constricted under the tape, that is a signal. Not a test of endurance.
Tape forces the mouth shut. Training invites the nose in.
One works against a habit. The other builds a new one.
And now you know why the path to nasal breathing begins during the day and not in the evening in front of the mirror.
What the data allow us to say today
Before you make a decision about your nights, it is worth sorting things clearly. What is well documented, what is plausible, what is open?
Best documented
The nose warms, humidifies and filters the air. Mouth breathing increases airway resistance during sleep and can favour breathing interruptions, as a small randomised study showed. An obstructed nose worsens sleep apnoea values, according to a meta-analysis. Exercises for the tongue and throat can lower the apnoea-hypopnoea index, supported by randomised studies.
Plausible, but thinly studied
That nitric oxide from the nose brings measurable benefits for oxygen uptake and defence during sleep. That nasal breathing promotes recovery at night via the vagus nerve, because the HRV data come from the waking state.
Open
Whether mouth taping changes anything in people without snoring and without sleep apnoea. How safe it is over months and years. And who exactly might benefit from it.
What I observe clinically
Many people only notice their mouth breathing when someone points it out to them. Often, behind the open mouth there is a nose that has not been clear for a long time. This is an observation from my practice, not a finding from studies.
And now you know why a strip of tape raises a question that is bigger than one night: how freely do you allow yourself to breathe?
Common questions about mouth taping and nasal breathing
What is mouth taping?
Mouth taping means sealing your mouth with a strip of adhesive tape before you go to sleep. The aim is for you to breathe through your nose instead of your mouth at night. The trend became known mainly through social media, where videos report better sleep, less snoring and fresher breath. In an analysis of 50 TikTok videos, better sleep and oral health were the most common promises. Hardly any of these claims has so far been specifically tested in studies.
Does mouth taping help with snoring?
In some people, snoring can become quieter. In a small study from Taiwan with 20 mouth breathers with mild sleep apnoea, the snoring index fell by 47 percent with tape. However, the study had no control group, and the authors consider a placebo effect possible. Quieter snoring also does not mean that the breathing interruptions disappear. If you snore regularly, it is worth having the cause assessed first.
Is mouth taping dangerous?
For some people it can be risky. A systematic review from 2025 sees a potentially serious risk for anyone who adopts the trend without a medical assessment, and names a risk of suffocation when the nose is blocked. Many studies had excluded people with nasal problems from the outset. In one study, airflow fell in heavy mouth breathers with a narrowing in the nasopharynx as soon as the mouth was closed. I advise against it with a blocked nose, a cold, allergies or suspected sleep apnoea, after alcohol or sleeping pills, and in children.
Can mouth taping help with sleep apnoea?
In mild sleep apnoea, two small studies without a control group show an improvement. There, the apnoea-hypopnoea index fell from 8.3 to 4.7 and from 12.0 to 7.8 events per hour respectively. In a study with 71 people, by contrast, nocturnal oxygen desaturation did not improve with tape in about half of them, and many blew air out past their lips. As an add-on to CPAP therapy under medical supervision, mouth tape extended daily use of the mask by 51.8 minutes in a randomised study. Sleep apnoea therefore calls for medical supervision rather than experimenting on your own.
Why is nasal breathing better during sleep?
The nose warms, humidifies and filters the air before it reaches the lungs. It brings the inhaled air towards 37 degrees Celsius and 100 percent relative humidity. During sleep, airway resistance is markedly lower with nasal breathing. In a randomised study with 12 healthy people, it was more than twice as high with mouth breathing, and there were 43 instead of 1.5 breathing interruptions per hour. This is probably one reason why healthy adults breathe almost exclusively through the nose during sleep: in one measurement, it was more than 95 percent of the air they breathed.
What does nitric oxide have to do with nasal breathing?
The mucous membrane of the paranasal sinuses constantly produces nitric oxide, a gaseous messenger. Its concentration in healthy sinuses is above the amount that inhibits bacteria in laboratory experiments, and it can stimulate the cilia. With every breath through the nose, some of it reaches the lungs, where it can support oxygen uptake. In a small study, oxygen partial pressure in the skin was 10 percent higher with nasal breathing than with mouth breathing. Humming can briefly raise the nitric oxide content of nasal air to 15 times its usual level.
How can I tell that I breathe through my mouth at night?
Typical signs are a dry mouth or throat in the morning, snoring and a nose that is often blocked. In one study, 31.4 percent of people with sleep apnoea almost always woke up with a dry mouth, compared with 3.2 percent in a comparison group from a general health examination. If you are unsure, someone you trust can observe how you sleep. A dry mouth in the morning is a signal that you should understand rather than simply tape over.
How can I breathe more through my nose during the day?
The first step is a clear nasal passage. A frequently blocked nose, allergies or a deviated septum can be assessed by a doctor. After that, you can practise nasal breathing while awake, with loosely closed lips, your tongue resting against the palate and a slow, quiet breath. In a meta-analysis of seven randomised studies, exercises for the tongue and throat lowered the apnoea-hypopnoea index by an average of 10.2 events per hour. According to a large meta-analysis, slow breathing can increase vagally mediated heart rate variability.
Should children try mouth taping?
I clearly advise against it. The studies on mouth taping during sleep mainly involve adults, and reliable data on safety in children are lacking. Enlarged adenoids, polyps or allergies can lie behind mouth breathing in children, and in exactly these cases a sealed mouth can become dangerous. Snoring and mouth breathing in children should be assessed by a paediatrician or an ear, nose and throat specialist.
Is mouth taping good for your teeth?
It is conceivable, but it has not been studied directly. The pH in the mouth drops during sleep anyway, and with forced mouth breathing it fell on average from 7.0 to 6.6 in one study. A more acidic environment is discussed as a possible factor in dental erosion and tooth decay. Whether mouth taping prevents tooth decay has not been shown so far. For your teeth, the question of why you breathe through your mouth is probably more valuable than any strip of tape.
When should I have my snoring assessed by a doctor?
When you snore loudly and regularly, when someone has observed pauses in your breathing or when you gasp for air at night. A dry mouth in the morning almost every day, frequently needing to urinate at night and high blood pressure can also be signs of sleep apnoea. In a population study from Western Pomerania, 46 percent of adults had at least mild obstructive sleep apnoea, and daytime sleepiness was not linked to the diagnosis. So you can be affected without feeling tired during the day. An assessment usually begins with a conversation and a sleep study at home or in a sleep laboratory.
More in the Guide to Nature's Forces
- Using nature's forces in everyday life: light, cold, heat, movement, air and rhythm
- Breathing techniques for the nervous system and the vagus nerve
- 4-7-8 breathing for falling asleep
- Fresh air: why indoor air can make you tired
- Full moon and sleep: what studies show
- Day and night biorhythm
- Chronobiology: how morning light sets the body clock
- Forest bathing for stress and burnout
- All articles in the Guide to Nature's Forces
If you want to read on from here
Mouth taping touches on sleep, breathing, the mouth and the nervous system. These articles pick up the thread from a different direction.
Recognising sleep apnoea
Understanding symptoms, diagnostics and therapy
SleepGrinding your teeth at night
Bruxism, arousal and stress during sleep
SleepSleep hygiene
What counts according to the evidence and what is overrated
SleepSleep trackers
What Oura, Whoop and the like measure, and how accurately
SleepHistamine and sleep
Why you may lie awake at night
SleepTrouble staying asleep
When you keep waking up at night
SleepA holistic view of sleep
KPNI, anthroposophy, HRV and functional medicine
SleepTongue coating and bad breath
What the mouth can reveal about the body
DetoxSources
All figures are taken from the abstracts or full texts of the cited works and were cross-checked via PubMed. Study type and sample size are given in square brackets in each case.
- Rhee J, Iansavitchene A, Mannala S, Graham ME, Rotenberg B. Breaking social media fads and uncovering the safety and efficacy of mouth taping in patients with mouth breathing, sleep disordered breathing, or obstructive sleep apnea: A systematic review. PLoS One. 2025;20(5):e0323643. DOI: 10.1371/journal.pone.0323643 [Systematic review, k=10, n=213]
- Fangmeyer SK, Badger CD, Thakkar PG. Nocturnal mouth-taping and social media: A scoping review of the evidence. Am J Otolaryngol. 2025;46(1):104545. DOI: 10.1016/j.amjoto.2024.104545 [Review, scoping review with analysis of 50 TikTok videos, k=9]
- Lee YC, Lu CT, Cheng WN, Li HY. The Impact of Mouth-Taping in Mouth-Breathers with Mild Obstructive Sleep Apnea: A Preliminary Study. Healthcare (Basel). 2022;10(9):1755. DOI: 10.3390/healthcare10091755 [Case series, retrospective before and after study without a control group, n=20]
- Huang TW, Young TH. Novel porous oral patches for patients with mild obstructive sleep apnea and mouth breathing: a pilot study. Otolaryngol Head Neck Surg. 2015;152(2):369-373. DOI: 10.1177/0194599814559383 [Case series, prospective pilot study without a control group, n=30]
- Jau JY, Kuo TBJ, Li LPH, et al. Mouth Puffing Phenomenon and Upper Airway Features May Be Used to Predict the Severity of Obstructive Sleep Apnea. Nat Sci Sleep. 2023;15:165-174. DOI: 10.2147/NSS.S384387 [Pathophysiology, home sleep test with one night each without and with tape, n=71]
- Yang H, Huyett P, Wang TY, et al. Mouth Closure and Airflow in Patients With Obstructive Sleep Apnea: A Nonrandomized Clinical Trial. JAMA Otolaryngol Head Neck Surg. 2024;150(11):1012-1019. DOI: 10.1001/jamaoto.2024.3319 [Pathophysiology, nonrandomised clinical trial with sleep endoscopy, n=54]
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- Cooper S, Oborne J, Harrison T, Tattersfield A. Effect of mouth taping at night on asthma control: a randomised single-blind crossover study. Respir Med. 2009;103(6):813-819. DOI: 10.1016/j.rmed.2009.02.003 [RCT, crossover, single-blind, n=51]
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- Sahin-Yilmaz A, Naclerio RM. Anatomy and physiology of the upper airway. Proc Am Thorac Soc. 2011;8(1):31-39. DOI: 10.1513/pats.201007-050RN [Review]
- Fitzpatrick MF, Driver HS, Chatha N, Voduc N, Girard AM. Partitioning of inhaled ventilation between the nasal and oral routes during sleep in normal subjects. J Appl Physiol. 2003;94(3):883-890. DOI: 10.1152/japplphysiol.00658.2002 [Pathophysiology, sleep laboratory study, n=10]
- Fitzpatrick MF, McLean H, Urton AM, Tan A, O'Donnell D, Driver HS. Effect of nasal or oral breathing route on upper airway resistance during sleep. Eur Respir J. 2003;22(5):827-832. DOI: 10.1183/09031936.03.00047903 [RCT, crossover, single-blind, n=12]
- Lundberg JO. Nitric oxide and the paranasal sinuses. Anat Rec (Hoboken). 2008;291(11):1479-1484. DOI: 10.1002/ar.20782 [Review]
- Lundberg JO, Settergren G, Gelinder S, Lundberg JM, Alving K, Weitzberg E. Inhalation of nasally derived nitric oxide modulates pulmonary function in humans. Acta Physiol Scand. 1996;158(4):343-347. DOI: 10.1046/j.1365-201X.1996.557321000.x [Pathophysiology, experimental human study, n=8 healthy volunteers plus mechanically ventilated patients]
- Weitzberg E, Lundberg JO. Humming greatly increases nasal nitric oxide. Am J Respir Crit Care Med. 2002;166(2):144-145. DOI: 10.1164/rccm.200202-138BC [Pathophysiology, experimental human study, n=10]
- Watso JC, Cuba JN, Boutwell SL, et al. Acute nasal breathing lowers diastolic blood pressure and increases parasympathetic contributions to heart rate variability in young adults. Am J Physiol Regul Integr Comp Physiol. 2023;325(6):R797-R808. DOI: 10.1152/ajpregu.00148.2023 [Pathophysiology, crossover in random order, n=20]
- Laborde S, Allen MS, Borges U, et al. Effects of voluntary slow breathing on heart rate and heart rate variability: A systematic review and a meta-analysis. Neurosci Biobehav Rev. 2022;138:104711. DOI: 10.1016/j.neubiorev.2022.104711 [Meta-analysis, k=223]
- Zelano C, Jiang H, Zhou G, et al. Nasal Respiration Entrains Human Limbic Oscillations and Modulates Cognitive Function. J Neurosci. 2016;36(49):12448-12467. DOI: 10.1523/JNEUROSCI.2586-16.2016 [Pathophysiology, intracranial EEG and behavioural experiments]
- Bernardi L, Sleight P, Bandinelli G, et al. Effect of rosary prayer and yoga mantras on autonomic cardiovascular rhythms: comparative study. BMJ. 2001;323(7327):1446-1449. DOI: 10.1136/bmj.323.7327.1446 [Pathophysiology, comparative study, n=23]
- Choi JE, Waddell JN, Lyons KM, Kieser JA. Intraoral pH and temperature during sleep with and without mouth breathing. J Oral Rehabil. 2016;43(5):356-363. DOI: 10.1111/joor.12372 [Pathophysiology, crossover with nose clip, n=10]
- Oksenberg A, Froom P, Melamed S. Dry mouth upon awakening in obstructive sleep apnea. J Sleep Res. 2006;15(3):317-320. DOI: 10.1111/j.1365-2869.2006.00527.x [Case-control, n=668 from the sleep laboratory plus 582 controls]
- Umlauf MG, Chasens ER. Sleep disordered breathing and nocturnal polyuria: nocturia and enuresis. Sleep Med Rev. 2003;7(5):403-411. DOI: 10.1053/smrv.2002.0273 [Review]
- Benjafield AV, Ayas NT, Eastwood PR, et al. Estimation of the global prevalence and burden of obstructive sleep apnoea: a literature-based analysis. Lancet Respir Med. 2019;7(8):687-698. DOI: 10.1016/S2213-2600(19)30198-5 [Review, literature-based prevalence estimate, 17 studies from 16 countries]
- Fietze I, Laharnar N, Obst A, et al. Prevalence and association analysis of obstructive sleep apnea with gender and age differences: Results of SHIP-Trend. J Sleep Res. 2019;28(5):e12770. DOI: 10.1111/jsr.12770 [Cohort, population-based with polysomnography, n=1,208]
- Young T, Finn L, Palta M. Chronic nasal congestion at night is a risk factor for snoring in a population-based cohort study. Arch Intern Med. 2001;161(12):1514-1519. DOI: 10.1001/archinte.161.12.1514 [Cohort, prospective, n=4,916]
- Saba ES, Kim H, Huynh P, Jiang N. Orofacial Myofunctional Therapy for Obstructive Sleep Apnea: A Systematic Review and Meta-Analysis. Laryngoscope. 2024;134(1):480-495. DOI: 10.1002/lary.30974 [Meta-analysis, k=7 RCTs, n=310]
- Camacho M, Certal V, Abdullatif J, et al. Myofunctional Therapy to Treat Obstructive Sleep Apnea: A Systematic Review and Meta-analysis. Sleep. 2015;38(5):669-675. DOI: 10.5665/sleep.4652 [Meta-analysis, k=9 adult studies, n=120]
- Puhan MA, Suarez A, Lo Cascio C, Zahn A, Heitz M, Braendli O. Didgeridoo playing as alternative treatment for obstructive sleep apnoea syndrome: randomised controlled trial. BMJ. 2006;332(7536):266-270. DOI: 10.1136/bmj.38705.470590.55 [RCT, n=25]